7640533671 has 8 divisors (see below), whose sum is σ = 10227018864. Its totient is φ = 5073868800.

The previous prime is 7640533661. The next prime is 7640533679. The reversal of 7640533671 is 1763350467.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7640533671 - 2¹¹ = 7640531623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640533679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4954180 + ... + 4955721.

It is an arithmetic number, because the mean of its divisors is an integer number (1278377358).

Almost surely, 2^7640533671 is an apocalyptic number.

7640533671 is a deficient number, since it is larger than the sum of its proper divisors (2586485193).

7640533671 is a wasteful number, since it uses less digits than its factorization.

7640533671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9910161.

The product of its (nonzero) digits is 317520, while the sum is 42.

The square root of 7640533671 is about 87410.1462703272. The cubic root of 7640533671 is about 1969.5842587701.

The spelling of 7640533671 in words is "seven billion, six hundred forty million, five hundred thirty-three thousand, six hundred seventy-one".